EPA Method 508 Surrogate Standard Back Catalog number: 19042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 53150 CLP Calibration Std. II Price on request 677581 Pethoxamid ESA sodium salt, 100µg/ml in Acetonitrile, 1ml Price on request 79074 EPA Method 8330 Analyte Price on request